hello, I've been trying to compile Orange on red hat linux (running python 2.5) and came across this error after installation (following the instructions you gave for Ubuntu). I'm wondering if it's quickly fixable?

>>> import orange__main__:1: RuntimeWarning: Python C API version mismatch for module orange: This Python has API version 1013, module orange has version 1012

Do you by any chance have multiple orange.so (or liborange.so) files lying around on your disk? My guess would be that orangeom.so finds the wrong liborange.so - the symbol which is reported missing appeared in Orange some half a year ago.